package com.leyou.gateway.config;


import com.leyou.gateway.config.pojo.CORSProperties;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;

import java.util.List;

@Configuration
public class GlobalCORSConfig {

    @Autowired
    private CORSProperties corsProperties;

    @Bean
    public CorsFilter corsFilter() {
        //1.添加CORS配置信息
        CorsConfiguration config = new CorsConfiguration();
        //1) 允许的域,不要写*，否则cookie就无法使用了
        List<String> allowedOrigins = corsProperties.getAllowedOrigins();
        for (String allowedOrigin : allowedOrigins) {
            config.addAllowedOrigin(allowedOrigin);
        }
        //2) 是否发送Cookie信息
        config.setAllowCredentials(corsProperties.getAllowedCredentials());
        //3) 允许的请求方式
        List<String> allowedMethods = corsProperties.getAllowedMethods();
        for (String allowedMethod : allowedMethods) {
            config.addAllowedMethod(allowedMethod);
        }

        // 4）允许的头信息
        List<String> allowedHeaders = corsProperties.getAllowedHeaders();
        for (String allowedHeader : allowedHeaders) {
            config.addAllowedHeader(allowedHeader);
        }

        // 5）有效期
        config.setMaxAge(corsProperties.getMaxAge());

        //2.添加映射路径，我们拦截一切请求
        UrlBasedCorsConfigurationSource configSource = new UrlBasedCorsConfigurationSource();
        configSource.registerCorsConfiguration(corsProperties.getFilterPath(), config);

        //3.返回新的CORSFilter.
        return new CorsFilter(configSource);
    }
}
